31278640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{211}}^1$

素因数の和:350

約数の個数: 80

約数和(自身を含む): 78075360

約数和(自身を除く): 46796720

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 109, 136, 170, 211, 218, 272, 340, 422, 436, 545, 680, 844, 872, 1055, 1090, 1360, 1688, 1744, 1853, 2110, 2180, 3376, 3587, 3706, 4220, 4360, 7174, 7412, 8440, 8720, 9265, 14348, 14824, 16880, 17935, 18530, 22999, 28696, 29648, 35870, 37060, 45998, 57392, 71740, 74120, 91996, 114995, 143480, 148240, 183992, 229990, 286960, 367984, 390983, 459980, 781966, 919960, 1563932, 1839920, 1954915, 3127864, 3909830, 6255728, 7819660, 15639320, 31278640]

約数ペア:

[(1, 31278640), (2, 15639320), (4, 7819660), (5, 6255728), (8, 3909830), (10, 3127864), (16, 1954915), (17, 1839920), (20, 1563932), (34, 919960), (40, 781966), (68, 459980), (80, 390983), (85, 367984), (109, 286960), (136, 229990), (170, 183992), (211, 148240), (218, 143480), (272, 114995), (340, 91996), (422, 74120), (436, 71740), (545, 57392), (680, 45998), (844, 37060), (872, 35870), (1055, 29648), (1090, 28696), (1360, 22999), (1688, 18530), (1744, 17935), (1853, 16880), (2110, 14824), (2180, 14348), (3376, 9265), (3587, 8720), (3706, 8440), (4220, 7412), (4360, 7174)]